Throat for fastening inserting machines



Feb. 25, 1947. .J, HARKEEM 2,416,312"

THROAT FOR FASTENING I'NQSERTING MACHINES I Filed N 'v. a0, 1945 Inventor Jahz es AHar/reem I l I l Patented Feb. 25, 1947 THROAT FOR FASTENING INSERTING MACHINES James A. Harkeem, Manchester, N. H., assignor to United Shoe Machinery Corporation, Flemington, N. J a corporation of New Jersey ApplicationNovernber 30, 1945, Serial No. 631,880

5 Claims. 1

This invention relates to machines for inserting fastenings and is herein disclosed as embodied in a tack driving machine of the type illustrated in United States Letters Patent Nos. 1,106,393 and 1,312,598, granted on August 11, 1914, and August 12, 1919, respectively, on applications filed in the namesof Fred L. Mac- Kenzie and Frank H. Warren, respectively.

It is an object of the present invention to provide machines of the aforesaid type with improved means adapted to facilitate the use of such machines in securing steel shank pieces to shoe bottoms.

. For the purpose in view, the construction and arrangement of the operating instrumentalities of the .illustrated machine, which instrumentalities primarily comprise a work engaging throat through which the fastenings, such as tacks, are passed by. a driver during the tack driving operation and tack holding jaws extending from the throat, is such that the jaws pivotally engage, by means of upwardly extending hook shaped portions, a beaded portion provided on the lower end of the throat. The jaws are held closed against each other so as to form a tackholding pocket and to act as work gages partly enterinf-i. tack holes provided'in the steel shankxpiece, by an annular spring surrounding the jaws and arranged to yield so as to permitthe jaws to separate upon the driving of a tack and. to move out of the tack hole in the steel shank piece after thepoint .of the tack has entered the work. Preferably and as herein illustrated, means is provided for holding the above mentioned jaws with their hook shaped portions at all times in pivotal engagement with the beaded portion on the lower end of the throat.

As will be noted, the mechanism provided in accordance with this invention is of extremely simple construction and its parts may be easily replaced in case of wear and tear.

In the accompanying drawings,

Fig. 1 is an angular view of part of a tack driving machine in which the present invention is embodied; I Fig. 2 is an angular bottom view of th throat of the machine illustrated in Fig. 1;. i

Fig. 3 is a sectional view of the [throat and work parts presented thereto;

Fig. 4 is a view similar to Fig. 3 with the machine parts assuming a difierent position in a cycle of operations. I

As illustrated in the drawings, the present machine is provided with. a throat 20 which, in substance, is a cylindrical member externally threaded on its upper portion and having a flange or collar. It is in threaded engagement with a tapped hole provided in the machine frame. The tacks are delivered to the throat by a separator. which serves to separate the lowermost, tack in a raceway '24 and to drop it into the throat tudinal axis, is provided near its opposite ends with tack holes through which the tacks se-. curing the shank piece to the shoe bottom'are inserted. The tack driven through the hole pro vided in the heelend portion of the shank piece S is caused to penetrate the entire thicknessof the insole I and to become clinched against the heel plate with which the last L is usually provided. The tack inserted through the hole at the forward end of the shank piece also is driven through the entire thickness of the insole I and either is clinched against the metal bottom of the last, if such is provided, or against a metal insert member if especially provided for this purpose in the last bottom, or the tack is driven into the'last', if its bottom is unarmored. In the latter case the tack is again pulled out of the last as a result of the last pulling 'operationand the end of the tack protruding into the shoe is then snipped off. 7

As illustrated in Figs. 3 and 4, the lower end of the throat 20 has a beaded portion 28 on which twotack holding jaws 30are mounted for pivotal movement toward and from each other. The

' jaws are hollow and form, when closed against each other, a tack holding pocket. Their lower ends are conically shaped so that the'jaws may be used, in properly positioning the shank piece by partly entering the tack hole in the shank piece after the latter has been laid' in proper I and out of engagement with each other, the jaws are provided with upwardly extending portions 32 which are .hook shaped in cross section and engage the beaded annular portion 28. of the throat 20. To. maintain the hook shaped portions 32.

in pivotal engagement with the beaded portion- 28 and to, cause the lowerends of thevjaws 30; to be closed against each other in the norma'l;

positionof the machine parts, there is provided a coil spring 34 which is located in an annular ,de--' pression on the outside of the jaws and complete- 1y surrounds the jaws the opposite ends otithe 2,416,312 f l I 3 spring beingjoined The spring 34 even though it tends to hold the jaws closed jaga'inst -each other, can yield during the tack'driving operaportions from slipping off the beaded portioii'of the throat 20. The ring '36 also prevents the spring 34, on separation of the jaws'iifl; from" riding up on the jaws.

As the jaws are being separated, due to the, wedging action of the,, .driven tack t, they slip out of the tack hole in the shank piece S when the tack point enters the insole (see Fig. '3). As illustrated in'Fig- 4, the jaws 30,although widely separated to clear'the head of the tackt, still maintain a guiding action on the tack, thus ensuring an accurate insertion of the tackat a predetermined location of the-work parts. V -I;Iaving described QmyinVenticin, what I claim as n'w and desire to'secureby LettersPatentfo'f thUhited-States i Y v 'A' machine 'for inserting fastenings" into a work piece' at predetermined portions thereof havi'iigfin combination, a throat forguiding the fastenings, an annular be'a'ded lip on the lower extremity of the throat,"'two jaws freely pro je'ting; froinl'the throat sfiaada'paq' -w act as aj-gageto positionth s ark-piece in" a predete'r iniiied-relation to the throat, the jaws being hol lowed to form between them a pocket for receiv} *centralizingfa fastening; upper hook shapedextensions on said-jaws adapted to engage said beaded lip tosupport the jaws and to afford pivotal movements thereoftowar'd and away from ea hbther and'with relationto the throat; and e f' i l r member rr die b hi w ee ed t d n a i ho de hs s against each other but arranged t o yield to per: nit-the a to" s p ra @upQ i' the dri n o a east r es; J as to. es t fa ten n t me her e eh' it h Jew a i e es" a c lit t liei f io u on thefefiafiii yde in 'the driving operation. 2 A machine for inserting a fasteningthrough at? e inasteel shankvpiece into a shoe'bottom m m er tot a hthe n ec 1 e o t m mem r ha n x b n 'm a tu el rthroat i'oremdin's, t fl e ine; an an u ar bead h 91 t ow r xt m ty f t e e t, two a s freely projectingjromj the" throat and provided wit m ca g hai t em e adap e part f r, t6 l'e t the mi (i he-s ank 111 it? PO tion' e s ank iec w t r a o t t e threat. withthe hole-in the shank piece in aline with the throat, thej jaws b in j hollowed toj'iorm between them a pocket ior receiyingand centralizing the fastening, upper hookshaped ex; tensions on said. jaws adapted to engage sa'd bea'd l m su p rt theg andJ Q fiord'piY: otal; movements thereof toward and away from ea Othef. a t re i n tot eith 'qat; an

an annular spring member surrounding 'bothfjaws and adapted'normallyto hold the jaws closed againsteach'other but arranged to yield to pere mit t-l'iefjaws to separateupon the driving of the fastening andto move out of thehole in the shank p'ie'cewhile still maintaining acentraliz ing action upon th fastening until it is fullydriveh. 3. A niachine"' for"-' inserting rastening into' a work piece'at predetermined-portions thereof'hav' ing', in combination, a throat 'for guidingt he fastenings "an annularbeaded 1115 on th 16wr relation to the throat, the jaws being hollowed to form between them a pocket for receiving and centralizing afastening, upper hook shaped extensions on said jaws adapted to engage said beaded lip to support the jaws and to afiord pivtal' movements thereof toward and away from each other and. with relation to the throat, an annular spring member surrounding both-jaws z:and:ada'pted"normal1y to hold the jaws closed against each other but arranged to yield to per- 'init thejaws to separate upon the driving of a fastening so as to enable the fastening to pass therethrough with'the jaws maintaining a centralizing action upon the fastening during the l driving operation, and means for holding said jaws 'withtheir hook shaped extensions at all times in pivotal engagement with said lip.

4. A machine'for inserting fastenings into a work piece 'at' predetermined portions thereof having,in combination, athro'at rorgu dmg the fasten ings', an 'annular' beaded lip'onthe lower extreme ity' of the throat, two'jaws freely projecting from thethro'at' and adapted to act as a gage to ppsi' tion the work piece in a 'predeterminedrelation to the throat, the jaws being hollowed to forin betweenlthe'm a pocket'for receiving'and centralizing a fastening, 'upperhook shaped extensions on "said jaws adapted to 3 engage saidbeaded lip to support the j-a'w's and to' 'afiord pivotal movementsthereof toward and away froni' each' other arid with relatiorrto -the throatfafi annular spring member "surrounding both jaws and adapted n'oi' mally to hold the jaws close'd'against each other but arranged .to'yieldto' permitthe jaws to sepv arate' upon the driving of a fastening so as to enable thefastening' to passtherethrough with th' aws maintaining a centraliing action upon the fastening during "the driving operation, and an annularmember"surrounding the hook shaped extensions of the jaws to prevent said extensions from becoming disengaged from said beaded lip. 5."A machine for inserting a-fasteningthrough a hole in a steel shank-*piece intmashoe bottom member to attach the" shank piece to the bottom member having, in combination,- a tubular throat for=guiding the fastening, ian annular beaded lip onthe lower extremity of -the throat, two jaws freely projecting-from the throat and provided with conically "shaped' extr'emities adapted partially-to enter the-hole in the shank piece to position the shank-piece with relation to the throat with thehole in' the shank-piece in alinementwith the threat, the jaws be'ing hollowed to form between them a: pocket foifireceiving and centralizing, the fastening; upperhook shaped extensions on :said jaw's adapted to engage 'said beaded lip to support the jaws a'n'd'tdafiord pivotal. movements thereof toward and away from each other anda\vi'th relation to the throatjan annular spring member' surrounding iboth -jaws and adapted normally to hold the" jawsclosd against"'each"other but arr-an eizlto yield to per-v j driven, and an annular member surrounding the hook 'shaped extensionsfof the jaws to prevent said extensions from ecomi ngdisengaged from said be'adedlip." i j 

